Public Notice: Minker/Stout/Romaine Creek National Priorities List Superfund Site, Jefferson County, Missouri

Publish Date

February 25, 2026

Summary

First Five-Year Review Started

The U.S. Environmental Protection Agency (EPA) Region 7 has started the First Five-Year Review for the Minker/Stout/Romaine Creek National Priorities List Superfund Site.

Five-Year Reviews are required by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) when hazardous substances remain on-site above levels that permit people from using the land freely. These reviews check whether the cleanup plan is still protecting people and the environment. At this site, the main contaminant of concern is dioxin. This Five-Year Review is planned for completion by September 30, 2026.

The site includes a residential area approximately 25 miles southwest of St. Louis. In the early 1970s, the Bubbling Springs Ranch horse arena was sprayed with dioxin-contaminated oil to control dust. The dioxin-contaminated soil from the arena was later used as fill material in nearby residential areas. The EPA confirmed dioxin was present through soil sampling in 1982 and listed the site to the National Priorities List (NPL) in 1983 to aid in the cleanup of hazardous waste. Cleanup was completed in 1997.

Project information for this site is available online. To see the Five-Year Review (when it is completed) and other cleanup documents, visit EPA’s site profile page and open the “Site Documents & Data” section.

If you don’t have internet access, you can view these documents online at the following location:

Jefferson County Library - Arnold Branch
1701 Missouri State Rd.
Arnold, MO 63010
636-296-2204

EPA encourages community members to ask questions and report any concerns about this site.

If you have questions about the site, please contact:

Questions or requests for site information and/or the Five-Year Review process can be submitted to: Rachael Puleo, EPA Remedial Project Manager; email: puleo.rachael@epa.gov; or phone: 816-912-8844, or Tanya Young, EPA Community Involvement Coordinator; email: young.tanya@epa.gov;
or phone: 816-799-3251.

U.S. Environmental Protection Agency, Region 7
11201 Renner Boulevard, Lenexa, KS 66219
Toll-free: 1-800-223-0425